2DCons
-Gameplay can get repetitive [high amount of waves]
-Limited variety of monstersPros
-Co-op/single player both feel like complete games.[One often diminishes other]
-Variety of weapons/towers
-Many ways to "win"
-Good Value
-Unique look at tower defenceRating: BExplanation: Its combines first person shooter/tower defense. Which makes you feel more involved and not have to "sit and wait" during waves. Cant really go wrong with it. It retailed at $15 and you get good value out of it. Should be able to get cheaper now as well.

3DCons
-Very minor Hud issues [Extremely minor]Pros
-Everything renders perfect/near perfect.
-Its kind of cool seeing the whole layout of defense in 3D.
-You actually see the scale of everything in comparison to character.Rating: AExplanation: Not much to say on this that hasn't already been said. Looks great/ plays great.